[This is preliminary documentation and subject to change.]
A user's impression of audio transmission speed is markedly improved by the suppression of silent packets. The ISilenceSuppressor filter allows a developer to write applications which will not transmit packets during periods in which no sounds are being made.
This filter is used to detect when silence is being captured by the audio capture filter. When detected, this filter pauses a graph. This allows the SPH filter to be able to properly indicate talkspurt indications when packetizing audio samples.
For more detailed information, see Silence Suppression Filter.